Low water and pressure governor



Sept. l, 1931. P. H. FLECK 1,821,699

LOW WATER AND PRESSURE GOVERNOR Filed May 25, 1.926 5 Sheets-Sheet l sept. 1, 1931.

P. H. FLECK LOW WATER AND PRESSURE GOVERNR Filed May 25, 1926 3 Sheets-Sheet 2 Sept.` l, 1931. P. H. FLECK 1,821,699

LOW WATER AND PRESSURE GOVERNOR Filed May 25, 1926 3 Sheets-Sheet i5 INV TOR Law M m ATTORNEY g and sensitive 1n Patentedsspt. 1, 1931 UNITED STATES PATENT OFFICE H. FLICK, I OSSINING, NEW YORK, ASSIGNOR OF ONE-THIRD T0 ROBERT M. Am AND ONE-THIRD T0 JOSmH ROYLE, BOTH 0F OSSINING, NEW 'YORK LOW WATER AND PRESSURE GOVERNOR Application Med lay 25, 1926. Serial No. 111,487.

This invention relates to low-water and pressure governors and has for its object to provide a device of the character specified;j of sim le construction and accurate o eration. Other objects of the invention willpbe pointed out in the following description.

The preferred form of my improved device is shown in the drawings accompanying 10 this specification;

Wherein Figure 1 is a vertical lon 'tudinal section of a float chamber to w ich my device is ap lied. Fi 2 is a similar sectional view o al modi ed form of my 15 improvementsand Figs. 3 and 4 are similar views showing steps in the operation of the device- Directin `attention first to theshowing of Fi L 1 t e usual float chamber 2 is connecte by pipe' with the upper portion of a steam boi er. notk shown, and a similar pipe not shown may connect the lower portion of said chamber 2 with the lower portion` of the steam boiler, all .accordin to known practice. To the left hand en of said chamber the 'usual gage glass 4 is connected top and bottom, as usual.

Said chamber 2 is extended to the right a suflicient distance to accommodate float arm 5, fixed to the lower end of upright lever 6 vpivoted at. 7 in the lower end o nipple 8,

Aprojecting into said chamber 2. To the leftv and end of arm the usual iioat9 is fixed. To the upper endvof nip le 8, outside said chamber 2, the lower en of bellows 10, of known character, isvfixed. `The u per end of said bellows is fixed to head 11 1n which is fixed the'upper end of lever 6. The vertical opening through nipple 8 is large enou h to permit lever 6 to swing without inter erence and the joints between the ends of bellows 10' and nipple 8, and head 11 respectively and between lever 6 and said head are steam ti ht.

Adjacent llows 10 is a second bellows 15, the vlower end of which is carried by nip lle 16 through which it communicates with) the interior of chamber 2. The Yupper end of said bellows is fixed to head 17, the stem 18 cf which extends upwardly for sliding guidance through nut 19 of yoke 20. Outstanding to the right from yoke 20 is arm 21 on which is pivotally mounted at 22 mercury switch 23 of known character. From said mercury switch wires 24 lead to 55 some suitable apparatus of known character for overning eat under the boiler. Arm 25 o mercury switch 23 terminates downwardl7 in V shaped cam 26 which is engaged by rol 27 in arm 28. Roll 27 is urged to ena0 agement with cam 26 by pull spring 39.

aid arm 28 has rod 30 extendin horizontally to the right therefrom an slidabl mounted in transverse opening 29 throughI the uiper end of lever 6. Collar 31, pinned 65 to ro 30 takes the thrust of lever 6 in one direction and said rod may yield to the left under the tension of sprin 32 between lever 6 and collar 33 Vfixed to sald rod. Inear .34 de nding from arm 21 is pivotally mounted beiizrank 35. The downwardl reaching arm of said bellcrank is slotte to receive pin 36 fixed in cam roll arm 28. The other arm of said bellcrank, reaching to the left, is provided with an adjustable screw 37 whose point impinges on the upper face of 'bellows head 17.

The operation of the devicewill be readily understood. When, from an excess of pressure injohamber 2, bellows 15 is expanded upwardly, bellcrank is rocked in clockwise direction whereby arm ,28 is drawn to the left and roll 27y passes under cam 26 of arm 25 rocking that arm and mercury switch 23 in anti-clockwise direction against stop 38, thereb breaking the electric circuit in wires 24. ilpon the reduction of pressure in chamber 2 and bellows 15, the up- Vward pressure against screw 37 will be re- Directing attention now to the other fig-- ures of the drawings, in Fig. 2 the two separate devices for actuating the mercury I`switch are brought together and one bellows isl employed instead of two. In this arran ement float arm 5 is pivoted at 4() in fixed racket 41 in chamber 2 and the upper end of short lever 42 terminates in horns 43, 43, between which lies pin 44 of long lever 45 extending upwardly through nipple 46. Said lever 45 is fulcrumed in necked 1n ortion 47 of the base 48 of bellows 49. As bellows 49 expands upwardly under pressure from the steam in chamber 2 said lever 45 rises therewith as its upper end is fixed to bellows head 50. Projecting upwardly from said bellows head 50 is ear`51 in which is pivoted at 52 short arm or lever 53 carrying at its right hand end roll 54 for engaging cam 55 of mercury switch 23 pivoted at 22 in ost or yoke 20. Said lever 53 is counter alanced at its left hand end by adjustable weight 64.` Upstanding from lever 53 is horn 56 for engaging pin 57 of the mercury switch for starting the rocking movement of said switch.

In this modification, I have added an upwardly extending pointer from the mercury switch, to read against suitable indicators on hood 58 of case 59.

Also, in connection with water float 9, I have arrangedvalve 61 in inlet pipe 60 to be opened by lever 42 when the float falls. This valve is of plunger type, one end seating at 62 and the other end connected by pin 63 with lever 42.

The operation of this modification is similar to that of the device of Fig. 1. When pressure rises in float chamber 2, bellows 49 is expanded upwardly whereby horn 56 of lever 53 lifts pin 57 and the left hand end of mercury switch 23 and roll 54 rides under cam 55 and shifts said mercury switch in clockwise Adirection to the position of Fig. 3 thereby breaking the electric connec- 'tion in wires 24. When the pressure is again lowered in chamber 2 bellows 49 will .contract downwardly and the several parts be restored to the positions respectively of Fig. 2.

In case the water falls in chamber 2, float 9 descends therewith and the upper end of short lever 42 is swung tothe left and the upper end of coacting lever 45 to the right, whereby horn 56 gives an initial upward movement to pin 57 and roll 54 rides under cam 55 rocking switch 23 in clockwise direction. Coincident with the described descent of float 9 valve 61 is withdrawn to the left, thereby admitting water through pipe to chamber 2. When the water rises sufficiently in said chamber 2 the several parts of the apparatus will be restored to the respective positions of Fig. 2.

It will be understood that, while I have illustrated a mercury switch as the preferred device to be actuated by my improved mechanism, other switch devices known to the art, directed to similar ends may be used in place thereof.

I claim:

l. In a device of the character described the combination of a chamber, a lever pivoted therein, a float carried by said lever, means for admitting pressure to said chamber, a pivotally mounted switch, a cam on said switch, an arm carrying a roll for rocking said cam and means, including a bellows adapted to be expanded by pressure in said chamber, having said cam roll arm pivotally mounted thereon, said float lever bein operatively connected with said bellows or oscillatingthe upper end thereof for causing said cam roll to rock said cam.

2. In a device of the character described the combination of a chamber, a lever pivoted therein, a fioat carried by said lever, means for admitting pressure to said chamber, a pivotally mounted switch, a cam on said switch, an arm carrying a roll for rocking said cam means, including a bellows adapted to be expanded by pressure in said chamber, having said cam roll arm pivotally mounted thereon, a horn on said cam roll arm and a pin on said switch adapted to be engaged by said horn for initially rocking said switch, said float lever being operatively connected with said bellows for oscillating the upper end thereof for causing said cam roll to rock said cam.

3. In a device of the character described the combination of a chamber, a lever pivoted therein, a float carried by said lever, a pivotally mounted switch, a cylindrical corrugated bellows, means for oscillating one end of said bellows vfrom said lever and means for operating said switch from said bellows.

4. In a device of the character described the combination of a chamber, a lever pivoted therein, a fioat carried by said lever, a cylindrical corrugated bellows extraneous to said chamber, means for admitting pressure to said chamber and from said chamber to said bellows, a pivotally mounted switch, means for oscillating one end of said bellows from said lever, means for operating said switch from the oscillation of said bellows and means for operating said switch from the expansion of said bellows by pressure from said chamber.

5. In a device of the character described the combination of a chamber, a lever pivoted therein, a float carried by said lever, means for admitting pressure to said chamber, a pivotally mounted switch, a bellows adapted to be expanded by pressure in said chamber and also oscillated by said lever and means operatively connecting said switch, float lever and bellows for operating said switch from said bellows or from said lever.

6. In a device of the character described the combination'of a chamber, a lever pivoted therein, a fioat carried by said lever, means for admitting pressure to said chamber, a pivotally mounted switch, a bellows adapted to be expanded by pressure in said chamber, said float leverbeing operatively connected with said bellows for oscillating the upper end thereof and means operatively connecting said switch, float lever and bellows for o erating said switch from said bellows or rom said lever.

In witness whereof, I hereby aix my signature this 22nd day of May, 1926.

PHILIP H. FLECK. 

